Sorry, did not see your direct question before.....
The hull might be strong but it will never be as good as the day it came out of the factory the first time. Through-hulls were stressed during the sinking, the core might have been damaged, cracks under the gell, and countless other hidden flaws might appear with no warning. If the hull is your only concern you might end up with a very large bathtub or one massive repair bill trying to fix issues as they come up.
“Greatness Is Not In Where We Stand, But In What Direction We Are Moving. We Must Sail Sometimes With The Wind And Sometimes Against It – But Sail We Must, And Not Drift, Nor Lie At Anchor.”
Oliver Wendell Holmes